135812 has 12 divisors (see below), whose sum is σ = 250320. Its totient is φ = 64296.

The previous prime is 135799. The next prime is 135829. The reversal of 135812 is 218531.

It is an unprimeable number.

135812 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 818 + ... + 969.

It is an arithmetic number, because the mean of its divisors is an integer number (20860).

2¹³⁵⁸¹² is an apocalyptic number.

It is an amenable number.

135812 is a deficient number, since it is larger than the sum of its proper divisors (114508).

135812 is a wasteful number, since it uses less digits than its factorization.

135812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1810 (or 1808 counting only the distinct ones).

The product of its digits is 240, while the sum is 20.

The square root of 135812 is about 368.5267968547. The cubic root of 135812 is about 51.4019247615.

The spelling of 135812 in words is "one hundred thirty-five thousand, eight hundred twelve".